Door key fastener



1953 E. c. GRIESBACH 2,638,773

: DOOR KEY FASTENER Filed 001;. 25, 1951 Patented May 19, 1953 UNITEDSTATES ATENT OFFICE 2 Claims.

This invention provides a very convenient and inexpensive, easilyinstalled and effective attachment for securing the lock-actuating keyof a door in door-locked position, while preventing the key from beingturned from the outside of the door, or pushed from the keyhole to makepossible the insertion of another key or a pick.

Figure 1 of the accompanying drawing is a fractional perspective of aninner side of a door depicting the key fastener applied.

Figure 2 is a partial elevation of an inner side of a door showing thefastener applied.

Figure 3 is a pin or bolt which comprises a part of the presentinvention.

Figure 4 is a spring-steel fastener which is the novel feature of theinvention.

In the drawing, the numeral 5 designates a part of a door and 6 hasreference to a part of a frame carrying the usual keeper 1 for the deadbolt 8 of the door lock, said bolt being horizontally moveable by meansof the usual bit 9 on one end of the key shank I9. ll illustrates akeyhole in an escutcheon plate l2, through which the key is inserted andremoved, 13 shows one of the com-- monly used door knobs.

A flat spring-steel fastener or clasp M which may have a thickness ofabout .015 of an inch is provided and is to be tightly secured at oneend to the escutcheon plate with the use of the usual lower escutcheonplate Woodscrew 19 which is drawn through the hole 18 in a manner so asto permit said fastener to be sprung upward and away from the door. Abolt or pin is provided with a diameter less than the diameter of thehole H in the said spring-steel fastener and having a length sufficientto pass through the bow of the key l6 and the aperture 11 when the saidfastener is sprung to suiiiciently align the bow l5 and aperture l1.

When the pin is inserted in the manner as above described thespring-ssteel fastener provides a means of tightly constraining the pinso as to prevent the possibility of picking the lock or device.

Excellent and convenient results are obtainable from the detailsdisclosed, and they are preferably used, small variations may of coursebe made, within the scope of the invention as claimed.

I claim:

1. A device for holding a lock-actuating key of a door in door-lockedposition with the use of a bolt having sufiicient length for passagethrough the bow of the key and connect with a means secured. on the doorat a lateral point relative to the shank of the key, comprising thefollowing improvement: said means secured on the door being a springfastener having an aperture sufficiently large to permit passage of saidbolt therethrough and the fastener being so disposed that whenadequately sprung away from the door the aperture will permit passage ofthe bolt therethrough and constrain the bolt by spring action.

2. In combination with a pin arranged through the bow of alock-actuating key of a door for holding the key in door-lockedposition, a spring clasper having an aperture with sufiicient diameterfor passage of the pin therethrough being secured to the door at alateral point relative to the shank of the key in a manner so whenadequately sprung away from the door the aperture will permit passage ofthe pin therethrough and constrain the pin by spring action.

EDWIN C. GRIESBACH.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 138,272 Neracher Apr. 29, 1873 511,022 Livingstone r- Dec. 19,1893 628,438 Downing July 4, 1899 629,922 Robnett Aug. 1, 1899 820,696Brickell May 15, 1906 1,166,565 Wildt Jan. 4, 1916

